I read so many posts and learned a lot about building a enclosure and wanted to share the (almost) final result before I never do it because I am too busy machining great stuff . I also had Mark providing some very useful tipps, as the first version of the enclosure did not provide the expected sound suppression. Thanks to all for the very helpful posts.
My goal: I have the Nomad standing in my appartment with kids and wife, so I aimed for maximal sound suppression within a given space (I hide the encasing in a wardrobe)
Base Frame...build with 45mm Bosch Alu Profiles
Included extra profiles for the bottom to minimize vibrations...also added "Sonorock Plus" from Rockwool....as the Quiet Fiber stuff ins not available in Europe (at least i could not find a supplier...). Bottom is made of 18mm MDF plate. Black cover around the case is 10 mm MDF plates.
used 3 layers of isolation...
1.) 20mm Rockwool Sonorock Plus
2.) 2mm "Bitumen Plate"...very heavy stuff
3.) 20mm "foam with glue" / "Verbundschaumstoff"
integrated some LED's...the Nomad rests on Sorbothane 30 pads...3 Stripes and the front...3 at the back
Sucction: 35mm from the dust head (not visible in that picture) to the top...then 50mm from the top to a Festool CT 26...the 35mm tube is directly connected to the 50mm tube....the foam layer i use is forming a pretty tight fit around the 35mm tube...so I can not see and hear any air going in there...i also added a seperate air intake hole (not visible)....i will use a muffler to cover the air intake if there is a sound suppression problem...but so far the festool is the one making the greatest noise
I also discarded the idea of a window as the noise suppression was far below what I expected...so I fully plug in the cover you can see...the "glue of foam" makes a very tight fit when i plug it in (i really need to push to get the air out, which is a great sign)....doing the homeing cycle of the nomad without the plug gives me 58db of max noise level....with the plug i measure only 45db, which is what I need...
I plan to add a camera at the back of the Nomad, so that I can see whats going on within the dust head.
What I learned during the process:
- One looses a lot of noise suppression with a window
- Make the bottom stable as shown with a heavy 18mm MDF Plate
- Use different layers and layer types
- A Festool CT 26 is a great investment even if you do not plan to install a dust head and constant suction
- Use the feedback of the community before you start
I hope that helps, happy to take any questions!